Yellow Dog Linux Security Announcement
--------------------------------------

Package:	krb5	
Issue Date: 	July 25, 2001
Priority:	high		
Advisory ID: 	YDU-20010725-4


1. 	Topic:


	Updated packages are available which
	fixed a potential vulnerability in
	krb5-workstation's included ftp server.

2. 	Problem:


	"By use of a carefully-crafted authentication
	request, a malicious client could exploit a
	vulnerability made possible by a missing bounds check.
	A malicious client could also overflow the buffer
	space used by the server for performing globbing
	operations." (from Red Hat's security advisory)

	UPDATE (08-10-01): newer krb5 packages are now
	available which fix more vulnerabilities. See the
	new errata update available at:
	http://www.yellowdoglinux.com/resources/errata/YDU-20010810-2.txt


3. 	Solution:

   	a) Updating via yup...
   	We suggest that you use the Yellow Dog Update Program (yup)
   	to keep your system up-to-date. The following command(s) will
   	automatically retrieve and install the fixed version of
   	this update onto your system:

   		yup update krb5
		yup update krb5-libs
		yup update krb5-server
		yup update krb5-workstation 

   	b) Updating manually...
   	The update can also be retrieved manually from our ftp site
   	below along with the rpm command that should be used to install
   	the update.  (Please use a mirror site)

   		ftp://ftp.yellowdoglinux.com/pub/yellowdog/updates/yellowdog-2.0/ppc/RPMS/
		rpm -Fvh krb5-1.2.2-5.src.rpm
		rpm -Fvh krb5-libs-1.2.2-5.ppc.rpm
		rpm -Fvh krb5-server-1.2.2-5.ppc.rpm
		rpm -Fvh krb5-workstation-1.2.2-5.ppc.rpm 


4. Verification

MD5 checksum			  Package
--------------------------------  ----------------------------
ab1ddabc0941bc35cd986a7c4fddde1d  SRPMS/krb5-1.2.2-5.src.rpm
ace7f2982f62873803a9c01b849d1321  ppc/RPMS/krb5-devel-1.2.2-5.ppc.rpm
8c8a23b7f5a8b823259bbd3b527c1fa9  ppc/RPMS/krb5-libs-1.2.2-5.ppc.rpm
4d4a58cbbe373d50e0ffe458b12f3ffb  ppc/RPMS/krb5-server-1.2.2-5.ppc.rpm
8c0940aa0ab23ef321f07ddcc31f08dd  ppc/RPMS/krb5-workstation-1.2.2-5.ppc.rpm

If you wish to verify that each package has not been corrupted or tampered with,
examine the md5sum with the following command: rpm --checksig --nogpg filename


5. Misc.

Terra Soft has setup a moderated mailing list where these security, bugfix, and package
enhancement announcements will be posted. See http://lists.yellowdoglinux.com/ for more
information.

For information regarding the usage of yup, the Yellow Dog Update Program, see 
http://http://www.yellowdoglinux.com/support/solutions/ydl_general/yup.shtml